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针对某催化汽油吸附脱硫装置换热网络,分析装置流程,并且从整个流程中提取了6股冷物流和4股热物流的初始温度、目标温度、热负荷等数据,选择最小传热温差为15℃,利用夹点技术得到夹点温度为81.5℃,确定了装置的节能目标为节约公用工程量78.5%。然后利用夹点三原则对现有装置的换热网络进行分析,发现该装置夹点之上存在2个冷却器、夹点之下存在1个加热器并且存在1个换热器跨越夹点传热,这造成了能量的不合理利用从而造成能量浪费。针对这几个不合理的传热器,以现有网络为基础提出了增加2台换热器从而消除部分违背夹点原则的环节的换热网络优化方案,最终实现节约冷公用工程量52.8%,节约热公用工程量65.7%的效果。
Aiming at the heat exchange network of a catalytic gasoline adsorption desulfurization device, the process of the device was analyzed, and the initial temperature, target temperature and heat load of 6 cold streams and 4 hot streams were extracted from the whole process, and the minimum heat transfer temperature difference was 15 ℃, the pinch-in temperature was 81.5 ℃, and the energy-saving goal of the device was found to save 78.5% of the public works. Then using the pinch three principles to analyze the exchanging network of the existing device, it is found that there are two coolers above the pinch point, one heater under the pinch point and one heat exchanger across the pinch point pass Heat, which led to the irrational use of energy resulting in energy waste. In view of these unreasonable heat transfer devices, based on the existing network, two heat exchangers are added to eliminate part of the heat exchange network optimization scheme that violates the pinch point principle, and finally save the cold public works volume by 52.8% , Saving 65.7% of the effect of thermal public works.